Traceback (most recent call last):
  File "/usr/share/rhn/virtualization/poller.py", line 189, in ?
    domain_list = poll_hypervisor()
  File "/usr/share/rhn/virtualization/poller.py", line 63, in poll_hypervisor
    conn = libvirt.open(None)
  File "/usr/lib/python2.4/site-packages/libvirt.py", line 39, in open
    if ret is None:raise libvirtError('virConnectOpen() failed')
libvirt.libvirtError: virConnectOpen() failed